Organic light-emitting device

ABSTRACT

An organic light-emitting device including a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; and an electron transport region between the second electrode and the emission layer, wherein the electron transport region includes at least one first compound represented by the following Formula 1, at least one second compound represented by the following Formula 2, and at least one third compound represented by the following Formula 30:

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2014-0158057, filed on Nov. 13, 2014,in the Korean Intellectual Property Office, and entitled: “OrganicLight-Emitting Device,” is incorporated by reference herein in itsentirety.

BACKGROUND

1. Field

Embodiments relate to an organic light-emitting device.

2. Description of the Related Art

Organic light emitting devices (OLEDs) are self-emission devices thathave wide viewing angles, high contrast ratios, and short responsetimes. In addition, the OLEDs exhibit excellent luminance, drivingvoltage, and response speed characteristics, and produce full-colorimages.

The organic light-emitting device may include a first electrode disposedon a substrate, and a hole transport region, an emission layer, anelectron transport region, and a second electrode, which aresequentially disposed on the first electrode. Holes provided from thefirst electrode may move toward the emission layer through the holetransport region, and electrons provided from the second electrode maymove toward the emission layer through the electron transport region.The holes and the electrons are recombined in the emission layer toproduce excitons. These excitons change from an excited state to aground state, thereby generating light.

SUMMARY

Embodiments are directed to an organic light-emitting device.

One or more exemplary embodiments provide a high efficiency organiclight-emitting device.

According to one or more exemplary embodiments, an organiclight-emitting device includes a a first electrode; a second electrodefacing the first electrode; an emission layer disposed between the firstelectrode and the second electrode; and an electron transport regiondisposed between the second delectrode and the emission layer, whereinthe electron transport region includes at least one type of a firstcompound represented by Formula 1, at least one type of a secondcompound represented by Formula 2, and at least one type of a thirdcompound represented by Formula 30:

wherein, in Formulae 1, 2, 30, 50, and 51,

X₃₁ is C(R₃₁) or N (nitrogen atom), X₃₂ is C(R₃₂) or N, X₃₃ is C(R₃₃) orN, and at least one of X₃₁ to X₃₃ is N;

X₅₅ is C(R₅₅) or N, X₅₆ is C(R₅₆) or N, X₅₇ is C(R₅₇) or N, X₅₈ isC(R₅₈) or N, at least one of X₅₅ and X₅₆ in Formula 50 is N, and atleast one of X₅₇ and X₅₈ in Formula 51 is N;

L₁₁ to L₁₃, L₂₁ to L₂₃, and L₃₁ to L₃₃ are each independently selectedfrom a substituted or unsubstituted C₃-C₁₀ cycloalkylene group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkylene group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenylene group, a substitutedor unsubstituted C₁-C₁₀ heterocycloalkenylene group, a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group;

a11 to a13, a21 to a23, and a31 to a33 are each independently an integerselected from 0 to 3;

Ar₁₁ is a substituted or unsubstituted C₁-C₆₀ heteroaryl group includingone N (nitrogen atom);

Ar₂₁ is a substituted or unsubstituted C₁-C₆₀ heteroaryl group includingat least two N (nitrogen atom);

Ar₁₂, Ar₂₂, and Ar₃₁ are each independently selected from a substitutedor unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group;

R₁₁ to R₁₄, R₂₁ to R₂₄, R₃₁ to R₃₃, and R₅₁ to R₅₈ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅);

b11, b13, b21, b23, c2, and c4 are each independently an integerselected from 0 to 4, and b12, b14, b22, b24, c1, and c3 are eachindependently an integer selected from 0 to 3;

R₃₄ to R₄₃ are each independently selected from a group represented byFormula 50, a group represented by Formula 51, a hydrogen, a deuterium,—F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, asubstituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted orunsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstitutedC₆-C₆₀ arylthio group, a substituted or unsubstituted C₁-C₆₀ heteroarylgroup, a substituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, a substituted or unsubstituted monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅);

at least one of R₃₄ to R₃₈ is the group represented by Formula 50, andat least one of R₃₉ to R₄₃ is the group represented by Formula 51;

* is a binding site to a neighboring atom;

at least one substituent of the substituted C₃-C₁₀ cycloalkylene group,substituted C₁-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₁-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed heteropolycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₁-C₆₀ alkoxy group,substituted C₃-C₁₀ cycloalkyl group, substituted C₁-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substitutedC₁-C₆₀ heteroaryl group, substituted monovalent non-aromatic condensedpolycyclic group, and substituted monovalent non-aromatic condensedheteropolycyclic group is selected from,

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), and —B(Q₁₄)(Q₁₅);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), and —B(Q₂₄)(Q₂₅);and

—Si(Q₃₁)(Q₃₂)(Q₃₃) and —B(Q₃₄)(Q₃₅),

wherein Q₁ to Q₅, Q₁₁ to Q₁₅, Q₂₁ to Q₂₅, and Q₃₁ to Q₃₅ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

BRIEF DESCRIPTION OF THE DRAWING

Features will be apparent to those of skill in the art by describing indetail exemplary embodiments with reference to the attached drawings inwhich:

FIG. 1 illustrates a schematic view of an organic light-emitting deviceaccording to an embodiment.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter withreference to the accompanying drawings; however, they may be embodied indifferent forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey exemplary implementations to those skilled in the art.

In the drawing figures, the dimensions of layers and regions may beexaggerated for clarity of illustration. Like reference numerals referto like elements throughout.

As used herein, the term “and/or” includes any and all combinations ofone or more of the associated listed items. Expressions such as “atleast one of,” when preceding a list of elements, modify the entire listof elements and do not modify the individual elements of the list.

FIG. 1 illustrates a schematic view of an organic light-emitting device10 according to an embodiment. The organic light-emitting device 10 mayinclude a first electrode 110, an organic layer 150, and a secondelectrode 190.

Hereinafter, a structure and a method of manufacturing the organiclight-emitting device 10 according to an embodiment will be describedwith reference to FIG. 1.

Referring to FIG. 1, a substrate may be additionally disposed under thefirst electrode 110 or on the second electrode 190. The substrate may bea glass substrate or transparent plastic substrate, each with excellentmechanical strength, thermal stability, transparency, surfacesmoothness, ease of handling, and water resistance.

The first electrode 110 may be formed by depositing or sputtering amaterial for forming the first electrode on the substrate. When thefirst electrode 110 is an anode, the material for the first electrodemay be selected from materials with a high work function to facilitatehole injection. The first electrode 110 may be a reflective electrode, asemi-transmissive electrode, or a transmissive electrode. The materialfor the first electrode may be a transparent and highly conductivematerial, and examples of such a material may include indium tin oxide(ITO), indium zinc oxide (IZO), tin oxide (SnO₂), and zinc oxide (ZnO).When the first electrode 110 is a semi-transmissive electrode or areflective electrode, as a material for forming the first electrode, atleast one selected from magnesium (Mg), aluminum (Al), aluminum-lithium(Al—Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver(Mg—Ag) may be used.

The first electrode 110 may have a single-layer structure, or amulti-layer structure including a plurality of layers. For example, thefirst electrode 110 may have a triple-layer structure of ITO/Ag/ITO.

The organic layer 150 is disposed on the first electrode 110. Theorganic layer 150 may include an emission layer.

The organic layer 150 may further include a hole transport regionbetween the first electrode and the emission layer, and an electrontransport region between the emission layer and the second electrode.

The hole transport region may include at least one of a hole injectionlayer (HIL), a hole transport layer (HTL), a buffer layer, and anelectron blocking layer (EBL). The electron transport region may includeat least one of a hole blocking layer (HBL), an electron transport layer(ETL), and an electron injection layer (EIL).

The hole transport region may have a single-layered structure formed ofa single material, a single-layered structure formed of a plurality ofdifferent materials, or a multi-layered structure having a plurality oflayers formed of a plurality of different materials.

For example, the hole transport region may have a single-layeredstructure formed of a plurality of different materials, or a structureof hole injection layer/hole transport layer, a structure of holeinjection layer/hole transport layer/buffer layer, a structure of holeinjection layer/buffer layer, a structure of hole transport layer/bufferlayer, or a structure of hole injection layer/hole transportlayer/electron blocking layer, wherein layers of each structure aresequentially stacked from the first electrode 110 in this stated order.

When the hole transport region includes a hole injection layer, the holeinjection layer may be formed on the first electrode 110 by usingvarious methods, e.g., vacuum deposition, spin coating, casting,Langmuir-Blodgett (LB) method, ink-jet printing, laser-printing, orlaser-induced thermal imaging (LITI).

When the hole injection layer is formed by using vacuum deposition,vacuum deposition conditions may vary according to the compound that isused to form the hole injection layer and the desired structure of thehole injection layer to be formed. For example, vacuum deposition may beperformed at a temperature in a range of about 100° C. to about 500° C.,a degree of vacuum in a range of about 10⁻⁸ torr to about 10⁻³ torr,and/or a deposition rate in a range of about 0.01 Å/sec to about 100Å/sec.

When the hole injection layer is formed by using spin coating, spincoating conditions may vary according to the compound that is used toform the hole injection layer and the desired structure of the holeinjection layer to be formed. For example, spin coating may be performedat a coating rate in a range of about 2,000 rpm to about 5,000 rpmand/or a heat-treatment temperature in a range of about 80° C. to about200° C.

Next, the hole transport layer may be formed on the first electrode 110or on the hole injection layer by using various methods, e.g., vacuumdeposition, spin coating, casting, a LB method, ink-jet printing,laser-printing, or LITI. When the hole transport layer is formed byvacuum deposition or spin coating, conditions for vacuum deposition andcoating may be similar to the above-described vacuum deposition andcoating conditions for forming the hole injection layer.

The hole transport region may include at least one selected fromm-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, spiro-TPD, spiro-NPB, α-NPB,TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine) (TCTA),polyaniline/Dodecylbenzenesulfonic acid:polyaniline/dodecylabenzenesulfonic acid (Pani/DBSA),poly(3,4-ethylenedioxythiophene)/Poly(4-styrenesulfonate) (PEDOT/PSS),polyaniline/Camphor sulfonic acid (Pani/CSA),polyaniline/poly(4-styrenesulfonate) (PANI/PSS), a compound representedby Formula 201, and a compound represented by Formula 202.

In Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may each independently be selected from or include, e.g., asubstituted or unsubstituted C₃-C₁₀ cycloalkylene group, a substitutedor unsubstituted C₁-C₁₀ heterocycloalkylene group, a substituted orunsubstituted C₃-C₁₀ cycloalkenylene group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenylene group, a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group.

At least one substituent of the substituted C₃-C₁₀ cycloalkylene group,substituted C₁-C₁₀ heterocycloalkylene group, substituted C₁-C₁₀cycloalkenylene group, substituted C₁-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₁-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group, andsubstituted divalent non-aromatic condensed heteropolycyclic group maybe selected from:

a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid and a salt thereof, a sulfonic acidor a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkylgroup, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid and a salt thereof, a sulfonic acidor a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₀₁)(Q₂₀₂),—Si(Q₂₀₃)(Q₂₀₄)(Q₂₀₅), and —B(Q₂₀₆)(Q₂₀₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidand a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl, aC₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁₁)(Q₂₁₂), —Si(Q₂₁₃)(Q₂₁₄)(Q₂₁₅),and —B(Q₂₁₆)(Q₂₁₇); and

—N(Q₂₂₁)(Q₂₂₂), —Si(Q₂₂₃)(Q₂₂₄)(Q₂₂₅), and —B(Q₂₂₆)(Q₂₂₇);

xa1 to xa4 may each independently be selected from 0, 1, 2, and 3;

xa5 may be selected from 1, 2, 3, 4, and 5;

R₂₀₁ to R₂₀₄ may each independently be from or include, e.g., asubstituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkyl group, a substituted orunsubstituted C₃-C₁₀ cycloalkenyl group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthio group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group.

Q₂₀₁ to Q₂₀₇, Q₂₁₁ to Q₂₁₇, and Q₂₂₁ to Q₂₂₇ may each independently beselected from:

a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid and a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, anda C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid and a salt thereof, a sulfonic acidor a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, and a monovalentnon-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidand a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group.

For example, in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may each independently be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, an isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxygroup, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group;

xa1 to xa4 are each independently 0, 1, or 2;

xa5 is 1, 2, or 3;

R₂₀₁ to R₂₀ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group or a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, an azulenyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group.

The compound represented by Formula 201 may be represented by Formula201A.

For example, the compound represented by Formula 201 may be representedby Formula 201A-1.

The compound represented by Formula 202 may be represented by Formula202A.

In Formulae 201A, 201A-1, and 202A, L₂₀₁ to L₂₀₃, xa1 to xa3, xa5 andR₂₀₂ to R₂₀₄ may be the same as described in the present specification,R₂₁₁ may be the same as defined in connection with R₂₀₃, and R₂₁₃ toR₂₁₆ may each independently be selected from a hydrogen, a deuterium,—F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, and a monovalentnon-aromatic condensed heteropolycyclic group.

Examples of the compound represented by Formula 201 and the compoundrepresented by Formula 202 may include Compounds HT1 to HT20.

A thickness of the hole transport region may be in a range of about 100Å to about 10,000 Å, e.g., about 100 Å to about 1,000 Å. When the holetransport region includes both the hole injection layer and the holetransport layer, a thickness of the hole injection layer may be in arange of about 100 Å to about 10,000 Å, e.g., about 100 Å to about 1,000Å, and a thickness of the hole transport layer may be in a range ofabout 50 Å to about 2,000 Å, e.g., about 100 Å to about 1,500 Å. Whenthe thicknesses of the hole transport region, hole injection layer, andhole transport layer are within these ranges, the hole transport region,hole injection layer, and hole transport layer may have satisfactoryhole transporting characteristics without a substantial increase indriving voltage.

The hole transport region may further include, in addition to thematerials above, a charge-generating material to improve conductiveproperties. The charge-generating material may be homogeneously ornon-homogeneously dispersed throughout the hole transport region.

The charge-generating material may be, e.g., a p-dopant. The p-dopantmay be one selected from a quinone derivative, a metal oxide, and acyano group-containing compound. Examples of the p-dopant may includequinoe derivatives such as tetracyanoquinonedimethane (TCNQ) and2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ);metal oxides such as a tungsten oxide and a molybdenum oxide; andCompound HT-D1.

The hole transport region may further include at least one selected froma buffer layer and an electron blocking layer in addition to the holeinjection layer and the hole transport layer. The buffer layer maycompensate for an optical resonance distance according to a wavelengthof light emitted from the emission layer, and light-emission efficiencyof a formed organic light-emitting device may be improved. Materialsincluded in the hole transport region may be included in the bufferlayer. The electron blocking layer may help prevents injection ofelectrons from the electron transport region.

An emission layer may be formed on the first electrode 110 or the holetransport region by using various methods, e.g., vacuum deposition, spincoating, casting, LB method, ink-jet printing, laser-printing, or LITI.When the emission layer is formed by vacuum deposition or spin coating,deposition and coating conditions for the emission layer may bedetermined by referring to the deposition and coating conditions for thehole injection layer.

When the organic light-emitting device 10 is a full color organiclight-emitting device, the emission layer may be patterned into a redemission layer, a green emission layer, or a blue emission layer,according to a sub pixel. In an implementation, the emission layer mayhave a stacked structure of a red emission layer, a green emissionlayer, and a blue emission layer, or may include a red-light emissionmaterial, a green-light emission material, and a blue-light emissionmaterial, which are mixed with each other in a single layer, to emitwhite light.

The emission layer may include a host and a dopant. The host may includeat least one selected from TPBi, TBADN, ADN (also, referred to as“DNA”), CBP, CDBP, and TCP:

In an implementation, the host may further include a compoundrepresented by Formula 301.

Ar₃₀₁-[(L₃₀₁)_(xb1)-R₃₀₁]_(xb2)  <Formula 301>

In Formula 301,

Ar₃₀₁ may be selected from:

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, abenzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, ananthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, anaphthacene, a picene, a perylene, a pentaphene, and anindenoanthracene;

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, abenzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, ananthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, anaphthacene, a picene, a perylene, a pentaphene, and anindenoanthracene, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, aC₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group, and—Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (where, Q₃₀₁ to Q₃₀₃ are each independentlyselected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group,a C₆-C₆₀ aryl group, and a C₆₀ heteroaryl group);

the description of L₃₀₁ may be the same as defined in connection withL₂₀₁ herein;

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazole group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazole group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

xb1 may be selected from 0, 1, 2, and 3;

xb2 may be selected from 1, 2, 3, and 4.

For example, in Formula 301,

L₃₀₁ may be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group, each substitutedwith at least one selected from a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, and a chrysenyl group;

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, C₁-C₂₀ alkyl group, C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group.

For example, the host may include a compound represented by Formula301A.

Descriptions of the substituent groups in Formula 301A may be understoodby referring to the descriptions provided herein.

In an implementation, the compound represented by Formula 301A mayinclude at least one selected from Compounds H1 to H42.

In an implementation, the host may include at least one selected fromCompounds H43 to 1449.

The dopant may include at least one selected from a fluorescent dopantand a phosphorescent dopant.

The phosphorescent dopant may include an organometallic complexrepresented by Formula 401.

In Formula 401,

M may be selected from, e.g., iridium (Ir), platinum (Pt), osmium (Os),titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium(Tb), and thulium (Tm);

X₄₀₁ to X₄₀₄ may each independently be nitrogen or carbon;

rings A₄₀₁ and A₄₀₂ may each independently be selected from or include,e.g., a substituted or unsubstituted benzene, a substituted orunsubstituted naphthalene, a substituted or unsubstituted fluorene, asubstituted or unsubstituted spiro-fluorene, a substituted orunsubstituted indene, a substituted or unsubstituted pyrrole, asubstituted or unsubstituted thiophene, a substituted or unsubstitutedfuran, a substituted or unsubstituted imidazole, a substituted orunsubstituted pyrazole, a substituted or unsubstituted thiazole, asubstituted or unsubstituted isothiazole, a substituted or unsubstitutedoxazole, a substituted or unsubstituted isoxazole, a substituted orunsubstituted pyridine, a substituted or unsubstituted pyrazine, asubstituted or unsubstituted pyrimidine, a substituted or unsubstitutedpyridazine, a substituted or unsubstituted quinoline, a substituted orunsubstituted isoquinoline, a substituted or unsubstitutedbenzoquinoline, a substituted or unsubstituted quinoxaline, asubstituted or unsubstituted quinazoline, a substituted or unsubstitutedcarbazole, a substituted or unsubstituted benzimidazole, a substitutedor unsubstituted benzofuran, a substituted or unsubstitutedbenzothiophene, a substituted or unsubstituted isobenzothiophene, asubstituted or unsubstituted benzoxazole, a substituted or unsubstitutedisobenzoxazole, a substituted or unsubstituted triazole, a substitutedor unsubstituted oxadiazole, a substituted or unsubstituted triazine, asubstituted or unsubstituted dibenzofuran, and a substituted orunsubstituted dibenzothiophene.

At least one substituent of the substituted benzene, substitutednaphthalene, substituted fluorene, substituted spiro-fluorene,substituted indene, substituted pyrrole, substituted thiophene,substituted furan, substituted imidazole, substituted pyrazole,substituted thiazole, substituted isothiazole, substituted oxazole,substituted isoxazole, substituted pyridine, substituted pyrazine,substituted pyrimidine, substituted pyridazine, substituted quinoline,substituted isoquinoline, substituted benzoquinoline, substitutedquinoxaline, substituted quinazoline, substituted carbazole, substitutedbenzimidazole, substituted benzofuran, substituted benzothiophene,substituted isobenzothiophene, substituted benzoxazole, substitutedisobenzoxazole, substituted triazole, substituted oxadiazole,substituted triazine, substituted dibenzofuran, and substituteddibenzothiophene may be selected from:

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₄₀₁)(Q₄₀₂), —Si(Q₄₀₃)(Q₄₀₄)(Q₄₀₅),and —B(Q₄₀₆)(Q₄₀₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic groupand a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₄₁₁)(Q₄₁₂), —Si(Q₄₁₃)(Q₄₁₄)(Q₄₁₅),and —B(Q₄₁₆)(Q₄₁₇); and

—N(Q₄₂₁)(Q₄₂₂), —Si(Q₄₂₃)(Q₄₂₄)(Q₄₂₅), and —B(Q₄₂₆)(Q₄₂₇);

L₄₀₁ may be an organic ligand;

xc1 may be 1, 2, or 3; and

xc2 may be 0, 1, 2, or 3.

Each of descriptions of Q₄₀₁ to Q₄₀₇, Q₄₁₁ to Q₄₁₇, and Q₄₂₁ to Q₄₂₇ maybe the same as defined in connection with description of Q₁.

L₄₀₁ may be a monovalent, divalent, or trivalent organic ligand. Forexample,

L₄₀₁ may be selected from a halogen ligand (e.g., Cl or F), a diketoneligand (e.g., acetylacetonate, 1,3-diphenyl-1,3-propandionate,2,2,6,6-tetramethyl-3,5-heptandionate, or hexafluoroacetonate), acarboxylic acid ligand (e.g., picolinate,dimethyl-3-pyrazolecarboxylate, or benzoate), a carbon monooxide ligand,an isonitrile ligand, a cyano ligand, and a phosphorous ligand (e.g.,phosphine or phospite).

In Formula 401, when A₄₀₁ has two or more substituents, two or moresubstituents of A₄₀₁ may link to each other and form a saturated orunsaturated ring.

In Formula 401, when A₄₀₂ has two or more substituents, two or moresubstituents of A₄₀₂ may link to each other and form a saturated orunsaturated ring.

In Formula 401, when xc1 is 2 or greater, a plurality of ligands

in Formula 401 may be identical to or different from each other. InFormula 401, when xc1 is 2 or greater, A₄₀₁ and A₄₀₂ may be directlylinked to each other or may be linked with a linking group (e.g., aC₁-C₅ alkylene group, —N(R′)— (where, R′ is a C₁-C₁₀ alkyl group or aC₆-C₂₀ aryl group), or —C(═O)—) therebetween.

In an implementation, the phosphorescent dopant may include at least oneof Compounds PD1 to PD74.

In an implementation, the phosphorescent dopant may include PtOEP.

The fluorescent dopant may include at least one selected from DPAVBi,BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

In an implementation, the fluorescent dopant may include a compoundrepresented by Formula 501.

In Formula 501,

Ar₅₀₁ may be at least one selected from a naphthalene, a heptalene, afluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, aphenalene, a phenanthrene, an anthracene, a fluoranthene, atriphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene,a pentaphene, and an indenoanthracene; and

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, abenzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, ananthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene,naphthacene, a picene, a perylene, a pentaphene, and anindenoanthracene, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, aC₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group, and—Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (where, Q₅₀₁ to Q₅₀₃ are each independentlyselected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group,a C₆-C₆₀ aryl group, and a C₂-C₆₀ heteroaryl);

L₅₀₁ to L₅₀₃ may be the same as defined in connection with L₂₀₁ providedherein;

R₅₀₁ and R₅₀₂ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazole group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group and adibenzofuranyl group, and a dibenzothiophenyl group, each substitutedwith at least one selected from a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group;

xd1 to xd3 may each independently be selected from 0, 1, 2, and 3;

xd4 may be selected from 1, 2, 3, and 4.

The fluorescent dopant may be represented by at least one selected fromCompounds FD1 to FD9.

An amount of the dopant in the emission layer may be selected within arange of, e.g., about 0.01 part to about 15 parts by weight, based onabout 100 parts by weight of the host.

A thickness of the emission layer may be in a range of about 100 Å toabout 1,000 Å, e.g., about 200 Å to about 600 Å. When a thickness of theemission layer is within this range, the emission layer may haveexcellent light-emitting characteristics without a substantial increasein driving voltage.

Next, the electron transport region may be disposed on the emissionlayer.

The electron ransport region may include, e.g., at least one of a chargecontrol layer, an electron transport layer (ETL), and an electroninjection layer.

For example, the electron transport region may have a structure ofelectron transport layer/electron injection layer or a structure ofcharge control layer/electron transport layer/electron injection layer,wherein layers of each structure are sequentially stacked from theemission layer in this stated order.

According to an embodiment, the organic layer 150 of the organiclight-emitting device may include an electron transport region betweenthe emmission layer and the second electrode 190.

The electron transport region may include at least one first compoundrepresented by Formula 1, at least one second compound represented byFormula 2, and at least one third compound represented by Formula 30.

In Formulae 1, 2, 30, 50, and 51,

L₁₁ to L₁₃ may each independently be selected from or include, e.g., asubstituted or unsubstituted C₃-C₁₀ cycloalkylene group, a substitutedor unsubstituted C₁-C₁₀ heterocycloalkylene group, a substituted orunsubstituted C₃-C₁₀ cycloalkenylene group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenylene group, a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group.

In an implementation, in Formula 1, L₁₁ to L₁₃ may each independently beselected from, e.g.,

a phenylene group, a naphthylene group, a triphenylenylene group, and apyridinylene group;

a phenylene group, a naphthylene group, a triphenylenylene group, and apyridinylene group, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, a triphenylenegroup, and a pyridinyl group.

In Formula 1, a11, a12, and a13 each respectively denote the numbers ofL₁₁,

L₁₂, and L₁₃, and a11, a12, and a13 may each independently be an integerof 0 to 3. When a11, a12, and a13 are 2 or greater, at least two of theL₁₁, L₁₂, and L₁₃ are identical to or different from each other. Forexample, a11, a12, and a13 may each independently be 0 or 1.

In Formula 1, Ar₁₁ may be a substituted or unsubstituted C₁-C₆₀heteroaryl group including one nitrogen (N).

In an implementation, Ar₁₁ may be selected from, e.g.,

a pyridinyl group, a pyrrolyl group, an indolyl group, an isoindolylgroup, a quinolinyl group, an isoquinolinyl group, a benzoquinolinylgroup, a phenanthridinyl group, an acridinyl group, and aphenanthrolinyl group; and

a pyridinyl group, a pyrrolyl group, an indolyl group, an isoindolylgroup, a quinolinyl group, an isoquinolinyl group, a benzoquinolinylgroup, a phenanthridinyl group, an acridinyl group, and aphenanthrolinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, a pyridinyl group, apyrrolyl group, an indolyl group, an isoindolyl group, a quinolinylgroup, an isoquinolinyl group, a benzoquinolinyl group, aphenanthridinyl group, an acridinyl group, and a phenanthrolinyl group.

In an implementation, Ar₁₁ may be, e.g., a group represented by one ofFormulae 4-1 to 4-23.

In Formulae 4-1 to 4-23,

Z₄₁ and Z₄₂ may each independently be selected from, e.g., a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a quinolinyl group,an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, anda carbazolyl group,

f1 may be an integer selected from 0 to 4, f2 may be an integer selectedfrom 0 to 6, f3 may be an integer selected from 0 to 5, f4 may be aninteger selected from 0 to 8, and * is a binding site to a neighboringatom.

In an implementation, Ar₁₁ may be selected from, e.g.,

a pyridinyl group; and

a pyridinyl group substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, and a pyridinylgroup.

In Formula 1, Ar₁₂ may be selected from, e.g., a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group.

In an implementation, Ar₁₂ may be selected from, e.g.,

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, atriphenylene group, and a pyridinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, atriphenylene group, and a pyridinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, and a pyridinyl group.

In an implementation, Ar₁₂ may be selected from, e.g.,

a phenyl group, a naphthyl group, a triphenylene group, and a pyridinylgroup; and

a phenyl group, a naphthyl group, a triphenylene group, and a pyridinylgroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxygroup, a phenyl group, a naphthyl group, a triphenylene group, and apyridinyl group.

In Formula 1, R₁₁ to R₁₃ may each independently be selected from orinclude, e.g., a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅). Q₁ to Q₅ willbe described below in detail.

In an implementation, R₁₁ to R₁₃ may each independently be selectedfrom, e.g.,

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a pyridinyl group, and a pyrimidinylgroup;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a pyrrolyl group, a thiophenyl group, a furanyl group, animidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolylgroup, an oxazolyl group, an isoxazolyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, an indolyl group, an indazolyl group, a purinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, animidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group.

In an implementation, R₁₁ to R₁₃ may each independently be selectedfrom, e.g.,

a hydrogen, —F, a cyano group, a nitro group, a methyl group, an ethylgroup, a propyl group, an n-butyl group, an iso-butyl group, a sec-butylgroup, a tert-butyl group, an n-pentyl group, an iso-pentyl group, asec-pentyl group, a tert-pentyl group, an n-hexyl group, an iso-hexylgroup, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, aniso-heptyl group, a sec-heptyl group, a tert-heptyl group, an n-octylgroup, an iso-octyl group, a sec-octyl group, a tert-octyl group, ann-nonyl group, an iso-nonyl group, a sec-nonyl group, a tert-nonylgroup, an n-decanyl group, an iso-decanyl group, a sec-decanyl group, atert-decanyl group, a methoxy group, an ethoxy group, a propoxy group, abutoxy group, a pentoxy group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, and a triazinyl group;

a methyl group, an ethyl group, a propyl group, an n-butyl group, aniso-butyl group, a sec-butyl group, a tert-butyl group, an n-pentylgroup, an iso-pentyl group, a sec-pentyl group, a tert-pentyl group, ann-hexyl group, an iso-hexyl group, a sec-hexyl group, a tert-hexylgroup, an n-heptyl group, an iso-heptyl group, a sec-heptyl group, atert-heptyl group, an n-octyl group, an iso-octyl group, a sec-octylgroup, a tert-octyl group, an n-nonyl group, an iso-nonyl group, asec-nonyl group, a tert-nonyl group, an n-decanyl group, an iso-decanylgroup, a sec-decanyl group, a tert-decanyl group, a methoxy group, anethoxy group, a propoxy group, a butoxy group, a pentoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and atriazinyl group, each substituted with at least one selected from —F, acyano group, a nitro group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, a triazinyl group, and—Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group, butembodiments are not limited thereto.

b11, b12, b13 and b14 each respectively denote the numbers of R₁₁, R₁₂,R₁₃, and R₁₄, b11 and b13 may each independently be an integer selectedfrom 0 to 4, and b12 and b14 may each independently be an integerselected from 0 to 3. When b11 is 2 or greater, two or more R₁₁ areidentical to or different from each other, when b12 is 2 or greater, twoor more R₁₂ are identical to or different from each other, when b13 is 2or greater, two or more R₁₃ are identical to or different from eachother, and when b14 is 2 or greater, two or more R₁₄ are identical to ordifferent from each other.

In an implementation, the first compound represented by Formula 1 may berepresented by one of Formulae 1A to 1P.

In Formulae 1A to 1P,

L₁₁ to L₁₃, Ar₁₂, R₁₁ to R₁₄, a11 to a13 and b11 to b14 may beunderstood by referring to the descriptions provided herein, and

Ar₁₁ may be selected from, e.g.,

a pyridinyl group; and

a pyridinyl group substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, and a pyridinylgroup, but embodiments are not limited thereto.

In Formula 2, L₂₁ to L₂₃ may each independently be selected from orinclude, e.g., a substituted or unsubstituted C₃-C₁₀ cycloalkylenegroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylene group,a substituted or unsubstituted C₃-C₁₀ cycloalkenylene group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenylene group, asubstituted or unsubstituted C₆-C₆₀ arylene group, a substituted orunsubstituted C₁-C₆₀ heteroarylene group, a substituted or unsubstituteddivalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group.

In an implementation, L₂₁ to L₂₃ may each independently be selectedfrom, e.g.,

a phenylene group, a naphthylene group, a triphenylenylene group, apyridinylene group, an imidazolylene group, a pyrazolylene group, apyriazinylene group, a cinnolinylene group, a pyrazinylene group, aphthalazinylene group, a quinazolinylene group, a quinoxalinylene group,a pyrimidinylene group, a quinolinylene group, and a triazinylene group;and

a phenylene group, a naphthylene group, a triphenylenylene group, apyridinylene group, an imidazolylene group, a pyrazolylene group, apyriazinylene group, a cinnolinylene group, a pyrazinylene group, aphthalazinylene group, a quinazolinylene group, a quinoxalinylene group,a pyrimidinylene group, a quinolinylene group, and a triazinylene group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, a methyl group,an ethyl group, an n-propyl group, an iso-propyl group, an n-butylgroup, an iso-butyl group, a sec-butyl group, a tert-butyl group, aphenyl group, a naphthyl group, a triphenylene group, a pyridinyl group,an imidazolyl group, a pyrazolyl group, a pyriazinyl group, a cinnolinylgroup, a pyrazinyl group, a phthalazinyl group, a quinazolinyl group, aquinoxalinyl group, a pyrimidinyl group, a quinolinyl group, and atriazinyl group.

In Formula 2, a21, a22, and a23 each respectively denote the numbers ofL₂₁, L₂₂, and L₂₃, and a21, a22, and a23 may be each independently aninteger selected from 0 to 3. When a21, a22, and a23 are 2 or greater,two or more L₂₁, L₂₂, and L₂₃ may be identical to or different from eachother. For example, a21, a22, and a23 may each independently be 0 or 1.

In Formula 2, Ar₂₁ may be, e.g., a substituted or unsubstituted C₁-C₆₀heteroaryl group including at least two nitrogens (N).

In an implementation, Ar₂₁ may be selected from, e.g.,

a pyrazinyl group, a pyrimidinyl group, a pyrazolyl group, an imidazolylgroup, a pyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group; and

a pyrazinyl group, a pyrimidinyl group, a pyrazolyl group, an imidazolylgroup, a pyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a phenyl group, a naphthylgroup, a pyrazinyl group, a pyrimidinyl group, a pyrazolyl group, animidazolyl group, a pyriazinyl group, a cinnolinyl group, a phthalazinylgroup, a quinazolinyl group, a quinoxalinyl group, and a triazinylgroup.

In an implementation, Ar₂₁ may be, e.g., a group represented by one ofthe following Formulae 5-1 to 5-10.

In Formulae 5-1 to 5-10,

Z₅₁ and Z₅₂ may each independently be selected from, e.g., a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group,

g1 may be an integer selected from 0 to 3, g2 may be an integer selectedfrom 0 to 2, g3 may be an integer of 0 or 1, g4 may be an integerselected from 0 to 4, and g5 may be an integer selected from 0 to 2,

* is a binding site to a neighboring atom.

In an implementation, Ar₂₁ may be selected from, e.g.,

a pyrimidinyl group and a triazinyl group; and

a pyrimidinyl group and a triazinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, a methyl group, an ethyl group, ann-propyl group, an iso-propyl group, an n-butyl group, an iso-butylgroup, a sec-butyl group, a tert-butyl group, a phenyl group, a naphthylgroup, a pyrimidinyl group, and a triazinyl group.

In Formula 2, Ar₂₂ may be selected from or include, e.g., a substitutedor unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedheterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group.

In an implementation, Ar₂₂ may be selected from, e.g.,

a phenyl group, a naphthyl group, a triphenylene group, a pyrazinylgroup, a pyrimidinyl group, a pyrazolyl group, an imidazolyl group, apyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a triphenylene group, a pyrazinylgroup, a pyrimidinyl group, a pyrazolyl group, an imidazolyl group, apyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a phenyl group, a naphthylgroup, a triphenylene group, a pyrazinyl group, a pyrimidinyl group, apyrazolyl group, an imidazolyl group, a pyriazinyl group, a cinnolinylgroup, a phthalazinyl group, a quinazolinyl group, a quinoxalinyl group,and a triazinyl group.

In an implementation, Ar₂₂ may be selected from, e.g.,

a phenyl group, a naphthyl group, and a pyridinyl group; and

a phenyl group, a naphthyl group, and a pyridinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a phenyl group, a naphthylgroup, and a pyridinyl group.

In Formula 2, R₂₁ to R₂₃ may each independently be selected from orinclude, e.g., a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅). Q₁ to Q₅ willbe described below in detail.

In an implementation, R₂₁ to R₂₃ may each independently be selectedfrom, e.g.,

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a pyridinyl group, and a pyrimidinylgroup;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a pyrrolyl group, a thiophenyl group, a furanyl group, animidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolylgroup, an oxazolyl group, an isoxazolyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, an indolyl group, an indazolyl group, a purinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, animidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group.

In an implementation, R₂₁ to R₂₃ may each independently be selectedfrom, e.g.,

a hydrogen, —F, a cyano group, a nitro group, a methyl group, an ethylgroup, a propyl group, an n-butyl group, an iso-butyl group, a sec-butylgroup, a tert-butyl group, an n-pentyl group, an iso-pentyl group, asec-pentyl group, a tert-pentyl group, an n-hexyl group, an iso-hexylgroup, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, aniso-heptyl group, a sec-heptyl group, a tert-heptyl group, an n-octylgroup, an iso-octyl group, a sec-octyl group, a tert-octyl group, ann-nonyl group, an iso-nonyl group, a sec-nonyl group, a tert-nonylgroup, an n-decanyl group, an iso-decanyl group, a sec-decanyl group, atert-decanyl group, a methoxy group, an ethoxy group, a propoxy group, abutoxy group, a pentoxy group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, and a triazinyl group;

a methyl group, an ethyl group, a propyl group, an n-butyl group, anisobutyl group, a sec-butyl group, a tert-butyl group, an n-pentylgroup, an iso-pentyl group, a sec-pentyl group, a tert-pentyl group, ann-hexyl group, an iso-hexyl group, a sec-hexyl group, a tert-hexylgroup, an n-heptyl group, an iso-heptyl group, a sec-heptyl group, atert-heptyl group, an n-octyl group, an iso-octyl group, a sec-octylgroup, a tert-octyl group, an n-nonyl group, an iso-nonyl group, asec-nonyl group, a tert-nonyl group, an n-decanyl group, an iso-decanylgroup, a sec-decanyl group, a tert-decanyl group, a methoxy group, anethoxy group, a propoxy group, a butoxy group, a pentoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and atriazinyl group, each substituted with at least one selected from —F, acyano group, a nitro group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, a triazinyl group, and—Si(Q₃₃)(Q₃₄)(Q₃₅); and

—Si(Q)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group.

b21, b22, b23, and b24 each respectively denote the numbers of R₂₁, R₂₂,R₂₃, and R₂₄, where b21 and b23 are each independently an integerselected from 0 to 4, and b22 and b24 are each independently an integerselected from 0 to 3. When b21 is 2 or greater, two or more R₂₁ may beidentical to or different from each other, when b22 is 2 or greater, twoor more R₂₂ may be identical to or different from each other, when b23is 2 or greater, two or more R₂₃ may be identical to or different fromeach other, and when b24 is 2 or greater, two or more R₂₄ may beidentical to or different from each other.

In an implementation, the second compound represented by Formula 2 maybe, e.g., represented by one of the following Formulae 2A to 2P.

In Formulae 2A to 2P, L₂₁ to L₂₃, Ar₂₁, Ar₂₂, R₂₁ to R₂₄, a21 to a23,and b21 to b24 may be understood by referring to the descriptionsprovided herein,

Ar₂₁ may be selected from, e.g.,

a pyrimidinyl group and a triazinyl group; and

a pyrimidinyl group and a triazinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, a methyl group, an ethyl group, ann-propyl group, an iso-propyl group, an n-butyl group, an iso-butylgroup, a sec-butyl group, a tert-butyl group, a phenyl group, a naphthylgroup, a pyrimidinyl group, and a triazinyl group.

In Formula 30, X₃₁ may be C(R₃₁) or N, X₃₂ may be C(R₃₂) or N, X₃₃ maybe C(R₃₃) or N, and at least one of X₃₁ to X₃₃ may be N.

In an implementation, all of X₃₁, X₃₂, and X₃₃ may be N.

In Formula 30, X₅₅ may be C(R₅₅) or N, X₅₆ may be C(R₅₆) or N, X₅₇ maybe C(R₅₇) or N, X₅₈ may be C(R₅₈) or N, at least one of X₅₅ and X₅₆ inFormula 50 may be N, and at least one of X₅₇ and X₅₈ in Formula 51 maybe N.

In an implementation, X₅₅ is N, and X₅₆ is N; X₅₅ is N, and X₅₆ is C; orX₅₅ is C, and X₅₆ is N.

In an implementation, X₅₇ is N, and X₅₈ is N; X₅₇ is N, and X₅₈ is C; orX₅₇ is C, and X₅₈ is N.

In an implementation, in Formula 30, L₃₁ to L₃₃ may each independentlybe selected from, e.g.,

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pentacenylene group, arubicenylene group, a coronenylene group, an ovalenylene group, apyrrolylene group, a thiophenylene group, a furanylene group, animidazolylene group, a pyrazolylene group, a thiazolylene group, anisothiazolylene group, an oxazolylene group, an isoxazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, apyridazinylene group, an isoindolylene group, an indolylene group, anindazolylene group, a purinylene group, a quinolinylene group, anisoquinolinylene group, a benzoquinolinylene group, a phthalazinylenegroup, a naphthyridinylene group, a quinoxalinylene group, aquinazolinylene group, a cinnolinylene group, a carbazolylene group, aphenanthridinylene group, an acridinylene group, a phenanthrolinylenegroup, a phenazinylene group, a benzimidazolylene group, abenzofuranylene group, a benzothiophenylene group, anisobenzothiazolylene group, a benzoxazolylene group, anisobenzoxazolylene group, a triazolylene group, a tetrazolylene group,an oxadiazolylene group, a triazinylene group, a dibenzofuranylenegroup, a dibenzothiophenylene group, a benzocarbazolylene group, adibenzocarbazolylene group, a thiadiazolylene group, animidazopyridinylene group, and an imidazopyrimidinylene group; and

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pentacenylene group, arubicenylene group, a coronenylene group, an ovalenylene group, apyrrolylene group, a thiophenylene group, a furanylene group, animidazolylene group, a pyrazolylene group, a thiazolylene group, anisothiazolylene group, an oxazolylene group, an isoxazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, apyridazinylene group, an isoindolylene group, an indolylene group, anindazolylene group, a purinylene group, a quinolinylene group, anisoquinolinylene group, a benzoquinolinylene group, a phthalazinylenegroup, a naphthyridinylene group, a quinoxalinylene group, aquinazolinylene group, a cinnolinylene group, a carbazolylene group, aphenanthridinylene group, an acridinylene group, a phenanthrolinylenegroup, a phenazinylene group, a benzimidazolylene group, abenzofuranylene group, a benzothiophenylene group, anisobenzothiazolylene group, a benzoxazolylene group, anisobenzoxazolylene group, a triazolylene group, a tetrazolylene group,an oxadiazolylene group, a triazinylene group, a dibenzofuranylenegroup, a dibenzothiophenylene group, a benzocarbazolylene group, adibenzocarbazolylene group, a thiadiazolylene group, animidazopyridinylene group, and an imidazopyrimidinylene group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, C₁-C₂₀ alkyl group, C₁-C₂₀ alkoxy group, acyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group, butembodiments are not limited thereto.

In an implementation, L₃₁ to L₃₃ may each independently be selectedfrom, e.g.,

a phenylene group, a naphthylene group, a pyridinylene group, apyrimidinylene group, and a triazinylene group; and

a phenylene group, a naphthylene group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a pyridinyl group, a pyrimidinyl group, and a triazinyl group.

In Formula 30, Ar₃₁ may be selected from or include, e.g., a substitutedor unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedheterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group.

In an implementation, Ar₃₁ may be selected from, e.g.,

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group; and

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, acyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, athiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinylgroup, —Si(Q₃₁)(Q₃₂)(Q₃₃), and —B(Q₃₄)(Q₃₅),

wherein Q₃₁ to Q₃₅ may each independently be selected from, e.g., ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, and a triazinyl group.

In an implementation, Ar₃₁ may be selected from, e.g.,

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, and atriphenylene group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, and—Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₃₁ to Q₃₃ may each independently be selected from, e.g., ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, and a chrysenyl group.

In Formula 30, R₃₄ to R₄₃ may each independently be selected from orinclude, e.g., a group represented by Formula 50, a group represented byFormula 51, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅). Q₁ to Q₅ willbe described below in detail.

In an implementation, R₃₄ to R₄₃ may each independently be selectedfrom, e.g.,

a group represented by Formula 50, a group represented by Formula 51, ahydrogen, a deuterium, —F, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkylgroup, and a C₁-C₂₀ alkoxy group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group,an imidazolyl group, a pyrazolyl group, a thiazolyl group, anisothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a carbazolyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, an imidazopyridinyl group, and animidazopyrimidinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group,an imidazolyl group, a pyrazolyl group, a thiazolyl group, anisothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a carbazolyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, an imidazopyridinyl group, and animidazopyrimidinyl group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₁-C₁₀ alkylgroup, a C₁-C₁₀ alkoxy group, a phenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolylgroup, a thiophenyl group, a furanyl group, an imidazolyl group, apyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolylgroup, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, apyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, animidazopyridinyl group, an imidazopyrimidinyl group, and—Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a C₁-C₁₀ alkyl group, a C₁-C₁₀ alkoxy group, a phenyl group, and anaphthyl group.

In an implementation, R₃₄ to R₄₃ may each independently be selectedfrom, e.g.,

a group represented by Formula 50 and a group represented by Formula 51;

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₁₀ alkyl group, and a C₁-C₁₀ alkoxy group;

a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl groupand a triazinyl group;

a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinylgroup, and a triazinyl group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₁₀ alkyl group, a C₁-C₁₀ alkoxy group, a phenyl group, a naphthylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, and—Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a C₁-C₁₀ alkyl group, a C₁-C₁₀ alkoxy group, a phenyl group, and anaphthyl group.

In an implementation, R₃₄ to R₄₃ may each independently be selectedfrom, e.g., a group represented by Formula 50, a group represented byFormula 51, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, and —Si(Q₁)(Q₂)(Q₃),wherein Q₁ to Q₃ may each independently be selected from, e.g., a C₁-C₁₀alkyl group, a C₁-C₁₀ alkoxy group, a phenyl group, and a naphthyl group

In an implementation, the group represented by Formula 50 and the grouprepresented by Formula 51 may each independently be a group representedby one of Formulae 8-1 to 8-30.

In Formulae 8-1 to 8-30, * is a binding site to a neighboring atom.

At least one of R₃₄ to R₃₈ may be the group represented by Formula 50,and at least one of R₃₉ to R₄₃ may be the group represented by Formula51.

For example, in Formula 30, R₃₅ may be the group represented by Formula50, and R₄₂ may be the group represented by Formula 51.

In Formulae 30, 50, and 51, R₃₁ to R₃₃ and R₅₁ to R₅₈ may eachindependently be selected from or include, e.g., a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthio group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,—Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅). Q₁ to Q₅ will be described below indetail.

In an implementation, R₃₁ to R₃₃ and R₅₁ to R₅₈ may each independentlybe selected from, e.g.,

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a pyridinyl group, and a pyrimidinylgroup;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group,a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group,an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, and an imidazopyrimidinyl group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a pyrrolyl group, a thiophenyl group, a furanyl group, animidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolylgroup, an oxazolyl group, an isoxazolyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, an indolyl group, an indazolyl group, a purinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, animidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group.

In an implementation, R₃₁ to R₃₃ and R₅₁ to R₅₈ may each independentlybe selected from, e.g.,

a hydrogen, —F, a cyano group, a nitro group, a methyl group, an ethylgroup, a propyl group, an n-butyl group, an isobutyl group, a sec-butylgroup, a tert-butyl group, an n-pentyl group, an isopentyl group, asec-pentyl group, a tert-pentyl group, an n-hexyl group, an isohexylgroup, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, anisoheptyl group, a sec-heptyl group, a tert-heptyl group, an n-octylgroup, an isooctyl group, a sec-octyl group, a tert-octyl group, ann-nonyl group, an isononyl group, a sec-nonyl group, a tert-nonyl group,an n-decanyl group, an isodecanyl group, a sec-decanyl group, atert-decanyl group, a methoxy group, an ethoxy group, a propoxy group, abutoxy group, a pentoxy group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, and a triazinyl group;

a methyl group, an ethyl group, a propyl group, an n-butyl group, aniso-butyl group, a sec-butyl group, a tert-butyl group, an n-pentylgroup, an isopentyl group, a sec-pentyl group, a tert-pentyl group, ann-hexyl group, an iso-hexyl group, a sec-hexyl group, a tert-hexylgroup, an n-heptyl group, an iso-heptyl group, a sec-heptyl group, atert-heptyl group, an n-octyl group, an iso-octyl group, a sec-octylgroup, a tert-octyl group, an n-nonyl group, an iso-nonyl group, asec-nonyl group, a tert-nonyl group, an n-decanyl group, an iso-decanylgroup, a sec-decanyl group, a tert-decanyl group, a methoxy group, anethoxy group, a propoxy group, a butoxy group, a pentoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and atriazinyl group, each substituted with at least one selected from —F, acyano group, a nitro group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, a triazinyl group, and—Si(Q₃₃)(Q₃₄)(Q₃₅); and

—Si(Q₁)(Q₂)(Q₃),

wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from,e.g., a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group.

c1, c2, c3, and c4 each respectively denote the numbers of R₅₁, R₅₂,R₅₃, and R₅₄, where c1 and c3 may be each independently an integerselected from 0 to 4, and c2 and c4 may be each independently an integerselected from 0 to 3. When c1 is 2 or greater, two or more R₅₁ may beidentical to or different from each other, when c2 is 2 or greater, twoor more R₅₂ may be identical to or different from each other, when c3 is2 or greater, two or more R₅₃ may be identical to or different from eachother, and when c4 is 2 or greater, two or more R₅₄ may be identical toor different from each other.

In Formula 50 and 51, * is a binding site to a neighboring atom.

In an implementation, the third compound represented by Formula 30 maybe, e.g., represented by Formula 30A.

In Formula 30A, X₃₁ to X₃₃, X₅₅ to X₅₈, L₃₁ to L₃₃, Ar₃₁, R₃₁ to R₃₄,R₃₆ to R₄₁, R₄₃, R₅₁ to R₅₄, a31 to a33, and c1 to c4 may be the same asdescribed in the present specification.

In an implementation, the third compound may be, e.g., represented byone of the following Formulae 31-1 to 31-9.

In Formulae 31-1 to 31-9,

Ar₃₁ is selected from a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, and a triphenylene group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, and—Si(Q₃)(Q₃₂)(Q₃₃),

wherein Q₃₁ to Q₃₃ may each independently be selected from, e.g., ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, and a chrysenyl group;

R₃₇ and R₄₀ may each independently be selected from, e.g.,

a phenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group,a quinolinyl group and an isoquinolinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group,a quinolinyl group, and an isoquinolinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, afluorenyl group, a pyridinyl group, a quinolinyl group, and anisoquinolinyl group.

In an implementation, the first compound may be one of the followingCompounds 1 to 21, the second compound may be one of the followingCompounds A1 to A23, and/or the third compound may be one of thefollowing Compounds B1 to B12.

The electron transport region may include a charge control layer. Inorder to improve emission efficiency and lifespan of an organiclight-emitting device, optimizing balance between holes and electrons inan emission layer may be desirable. The charge control layer may controla speed of electrons to be injected into the emission layer to not toobe fast, and may control a migration rate of the electrons. Thus, anefficiency of the organic light-emitting device may increase. Also, thecharge control layer may control migration of the holes to an electrontransport layer, and thus lifespan of the organic light-emitting devicemay improve.

The charge control layer may be located adjacent to, e.g., directlyadjacent to, the emission layer. The charge control layer may controlinjection of holes from the emission layer to the electron transportlayer to help improve lifespan characteristics of the organiclight-emitting device.

When the electron transport region includes the charge control layer,the charge control layer may be formed on the emission layer by usingvarious methods, e.g., vacuum deposition, spin coating, casting, a LBmethod, ink-jet printing, laser-printing, or LITI. When the chargecontrol layer is formed by vacuum deposition or spin coating, depositionand coating conditions for the charge control layer may be determined byreferring to the deposition and coating conditions for the holeinjection layer.

In an implementation, the charge control layer may include the firstcompound and the second compound.

When the charge control layer includes the first compound and the secondcompound, a weight ratio of the first compound to the second compoundmay be in a range of about 1:99 to about 99:1. In an implementation, aweight ratio of the first compound to the second compound may be, e.g.,about 50:50. When a weight ratio of the first compound to the secondcompound is within this range, efficiency and lifespan of an organiclight-emitting device may improve.

When the charge control layer includes both the first compound and thesecond compound, an organic light-emitting device including the chargecontrol layer may have simultaneously improved efficiency and lifespan.

If the charge control layer only were to only include the firstcompound, injection of electrons to the emission layer may be enhanced.Accordingly, efficiency of the organic light-emitting device mayimprove, but lifespan of the organic light-emitting device may decrease.If the charge control layer were to only include the second compound,lifespan of the organic light-emitting device may improve, butefficiency of the organic light-emitting device may decrease.

The charge control layer may be located adjacent to, e.g., directlyadjacent to, the emission layer. The charge control layer may controlinjection of holes from the emission layer to the electron transportlayer to help improve lifespan characteristics of the organiclight-emitting device.

A thickness of the charge control layer may be in a range of about 20 Åto about 1,000 Å, e.g., about 30 Å to about 300 Å. When a thickness ofthe charge control layer is within this range, the charge control layermay have excellent hole blocking characteristics without a substantialincrease in driving voltage.

Next, the electron transport region may include at least one of theelectron transport layer and the electron injection layer on the chargecontrol layer.

In an implementation, the electron transport region may include theelectron transport layer. The electron transport layer may be formed onthe emission layer or on the charge control layer by using variousmethods e.g., vacuum deposition, spin coating, casting, a LB method,ink-jet printing, laser-printing, or LITI. When an electron transportlayer is formed by vacuum deposition or spin coating, vacuum depositionand coating conditions for the electron transport layer may bedetermined by referring to the vacuum deposition and coating conditionsfor the hole injection layer.

In an implementation, the electron transport layer may include the thirdcompound.

In an implementation, the electron transport region may include theelectron transport layer; and the charge control layer between theelectron transport layer and the emission layer, wherein the chargecontrol layer includes the first compound and the second compound, andthe electron transport layer includes the third compound.

When the electron transport layer includes the third compound, theelectron transport layer may have enhanced electron transportingcharacteristics. Thus a rate of injection of electrons to the emissionlayer may increase. In this regard, efficiency of the organiclight-emitting device may improve.

The electron transport layer may be located adjacent to, e.g., directlyadjacent to, the charge control layer. For example, the charge controllayer may be between the electron transport layer and the emissionlayer. The charge control layer may control injection of electrons fromthe electron transport layer to the emission layer to help improveefficiency characteristics of the organic light-emitting device.

A thickness of the electron transport layer may be in a range of about100 Å to about 1,000 Å, e.g., about 150 Å to about 500 Å. When athickness of the electron transport layer is within this range, theelectron transport layer may have satisfactory electron transportingcharacteristics without a substantial increase in driving voltage.

The electron transport layer may further include a metal-containingmaterial in addition to the third compound.

The metal-containing material may include a Li complex. The Li complexmay include, e.g., Compound ET-D1 (lithium quinolate, LiQ) or ET-D2. Inan implementation, the electron transport layer may include, e.g., thethird compound and LiQ.

The electron transport region may include an electron injection layerthat facilitates electron injection from the second electrode 190.

The electron injection layer may be formed on the electron transportlayer by using various methods, e.g., vacuum deposition, spin coating,casting, a LB method, ink-jet printing, laser-printing, or laser-inducedthermal imaging. When an electron injection layer is formed by vacuumdeposition or spin coating, vacuum deposition and coating conditions forthe electron injection layer may be determined by referring to thevacuum deposition and coating conditions for the hole injection layer.

The electron injection layer may include, e.g., at least one selectedfrom LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1Å to about 100 Å, e.g., about 3 Å to about 90 Å. When the thickness ofthe electron injection layer is within this range, electron injectingcharacteristics of the electron injection layer may be excellent withouta substantial increase in driving voltage.

The second electrode 190 may be disposed on the organic layer 150. Thesecond electrode 190 may be a cathode that is an electron injectionelectrode, and in this regard, a material for forming the secondelectrode 190 may be a material having a low work function, and such amaterial may be a metal, an alloy, an electrically conductive compound,or a mixture thereof. Examples of the material for the second electrode190 may include lithium (Li), magnesium (Mg), aluminum (Al),aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), ormagnesium-silver (Mg—Ag). In an implementation, the material for formingthe second electrode 190 may be, e.g., ITO or IZO. The second electrode190 may be a reflective electrode, a semi-transmissive electrode, or atransmissive electrode.

Hereinbefore, the organic light-emitting device has been described withreference to FIG. 1. In an implementation, any Q groups described abovemay be selected from or include, e.g., hydrogen, a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

A C₁-C₆₀ alkyl group used herein refers to a linear or branchedaliphatic monovalent hydrocarbon group having 1 to 60 carbon atoms, andexamples of the C₁-C₆₀ alkyl group may include a methyl group, an ethylgroup, a propyl group, an isobutyl group, a sec-butyl group, atert-butyl group, a pentyl group, an iso-amyl group, and a hexyl group.A C₁-C₆₀ alkylene group used herein refers to a divalent group havingthe same structure with the C₁-C₆₀ alkyl group.

A C₁-C₆₀ alkoxy group used herein refers to a monovalent grouprepresented by —OA₁₀₁ (where, A₁₀₁ is the C₁-C₆₀ alkyl group), andexamples of the C₁-C₆₀ alkoxy group may include a methoxy group, anethoxy group, and an isopropyloxy group.

A C₂-C₆₀ alkenyl group used herein refers to a hydrocarbon groupincluding at least one carbon double bond in the middle or at a terminalof the C₂-C₆₀ alkyl group, and examples of the C₂-C₆₀ alkenyl group mayinclude an ethenyl group, a prophenyl group, and a butenyl group. AC₂-C₆₀ alkenylene group used herein refers to a divalent group havingthe same structure with the C₂-C₆₀ alkenyl group.

A C₂-C₆₀ alkynyl group used herein refers to a hydrocarbon groupincluding at least one carbon triple bond in the middle or at a terminalof the C₂-C₆₀ alkyl group, and examples of the C₂-C₆₀ alkynyl group mayinclude an ethynyl group and a propynyl group. A C₂-C₆₀ alkynylene groupused herein refers to a divalent group having the same structure withthe C₂-C₆₀ alkynyl group.

A C₃-C₁₀ cycloalkyl group used herein refers to a monovalent monocyclicsaturated hydrocarbon group including 3 to 10 carbon atoms, and examplesof the C₃-C₁₀ cycloalkyl group may include a cyclopropyl group, acyclobutyl group, a cyclopentyl group, a cyclohexyl group, and acycloheptyl group. A C₃-C₁₀ cycloalkylene group used herein refers to adivalent group having the same structure with the C₃-C₁₀ cycloalkylgroup.

A C₁-C₁₀ heterocycloalkyl group used herein refers to a monovalentmonocyclic group including at least one hetero atom selected from N, O,P, and S as a ring-forming atom and 1 to 10 carbon atoms, and examplesof the C₁-C₁₀ heterocycloalkyl group may include a tetrahydrofuranylgroup and a tetrahydrothiophenyl group. A C₁-C₁₀ heterocycloalkylenegroup used herein refers to a divalent group having the same structurewith the C₁-C₁₀ heterocycloalkyl group.

A C₃-C₁₀ cycloalkenyl group used herein refers to a monovalentmonocyclic group including 3 to 10 carbon atoms and at least one doublebond in the ring of the C₃-C₁₀ cycloalkenyl group, and does not havearomacity. Examples of the C₃-C₁₀ cycloalkenyl group may include acyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. AC₃-C₁₀ cycloalkenylene group used herein refers to a divalent grouphaving the same structure with the C₃-C₁₀ cycloalkenyl group.

A C₁-C₁₀ heterocycloalkenyl group used herein refers to a monovalentmonocyclic group including at least one hetero atom selected from N, O,P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least onedouble bond in its ring. Examples of the C₁-C₁₀ heterocycloalkenyl groupmay include a 2,3-hydrofuranyl group and a 2,3-hydrothiophenyl group. AC₁-C₁₀ heterocycloalkenylene group used herein refers to a divalentgroup having the same structure with the C₁-C₁₀ heterocycloalkenylgroup.

A C₆-C₆₀ aryl group used herein refers to a monovalent group including acarbocyclic aromatic system having 6 to 60 carbon atoms, and a C₆-C₆₀arylene group used herein refers to a divalent group including acarbocyclic aromatic system having 6 to 60 carbon atoms. Examples of theC₆-C₆₀ aryl group may include a phenyl group, a naphthyl group, ananthracenyl group, a phenanthrenyl group, a pyrenyl group, and achrysenyl group. When the C₆-C₆₀ aryl group and the C₆-C₆₀ arylene groupeach include two or more rings, the rings may be fused to each other.

A C₁-C₆₀ heteroaryl group used herein refers to a monovalent grouphaving a carbocyclic aromatic system including at least one hetero atomselected from N, O, P, and S as a ring-forming atom and 1 to 6 carbonatoms. A C₂-C₆₀ heteroarylene group used herein refers to a divalentgroup having a carbocyclic aromatic system including at least one heteroatom selected from N, O, P, and S as a ring-forming atom and 1 to 60carbon atoms. Examples of the C₁-C₆₀ heteroaryl group may include apyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinylgroup, a triazinyl group, a quinolinyl group, and an isoquinolinylgroup. When the C₁-C₆₀ heteroaryl group and the C₁-C₆₀ heteroarylenegroup each include two or more rings, the rings may be fused to eachother.

A C₆-C₆₀ aryloxy group used herein denotes —OA₁₀₂ (where, A₁₀₂ is theC₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group used herein denotes—SA₁₀₃ (where, A₁₀₃ is the C₆-C₆₀ aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refersto a monovalent group (for example, having 8 to 60 carbon atoms) thathas two or more rings condensed to each other, only carbon atoms as aring forming atom, and non-aromacity in the entire molecular structure.Examples of the monovalent non-aromatic condensed polycyclic group mayinclude a fluorenyl group. A divalent non-aromatic condensed polycyclicgroup used herein refers to a divalent group having the same structurewith the monovalent non-aromatic condensed polycyclic group.

A monovalent non-aromatic condensed heteropolycyclic group used hereinrefers to a monovalent group (for example, having 1 to 60 carbon atoms)that has two or more rings condensed to each other, has a hetero atomselected from N, O, P, and S, other than carbon atoms, as a ring formingatom, and has non-aromacity in the entire molecular structure. Exampleof the monovalent non-aromatic condensed heteropolycyclic group mayinclude a carbazolyl group. A divalent non-aromatic condensedheteropolycyclic group used herein refers to a divalent group having thesame structure with the monovalent non-aromatic condensedheteropolycyclic group.

As used herein, at least one substituent of the substituted C₆-C₂₀aromatic ring, substituted C₃-C₁₀ cycloalkylene group, substitutedC₁-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀ cycloalkenylenegroup, substituted C₁-C₁₀ heterocycloalkenylene group, substitutedC₆-C₆₀ arylene group, substituted C₁-C₆₀ heteroarylene group,substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed heteropolycyclic group,substituted C₃-C₁₀ cycloalkyl group, substituted C₁-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₁-C₆₀ heteroaryl group, substituted monovalent non-aromatic condensedpolycyclic group, and substituted monovalent non-aromatic condensedheteropolycyclic group is selected from,

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), and —B(Q₁₄)(Q₁₅);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), and —B(Q₂₄)(Q₂₅);and

—Si(Q₃₁)(Q₃₂)(Q₃₃) and —B(Q₃₄)(Q₃₅),

wherein Q₁ to Q₅, Q₁₁ to Q₁₅, Q₂₁ to Q₂₅, and Q₃₁ to Q₃₅ may be eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

As used herein, the expression “Ph” denotes a phenyl group, theexpression “Me” denotes a methyl group, the expression “Et” denotes anethyl group, and the expression “ter-Bu” or “Bu^(t)” denotes atert-butyl group.

Hereinafter, an organic light-emitting device according to an embodimentwill be described in detail with reference to Synthesis Examples andExamples. Regarding Synthesis Examples below, the wording “B was usedinstead of A” includes the meaning that a molar equivalent amount of Bis identical to that of A.

The following Examples and Comparative Examples are provided in order tohighlight characteristics of one or more embodiments, but it will beunderstood that the Examples and Comparative Examples are not to beconstrued as limiting the scope of the embodiments, nor are theComparative Examples to be construed as being outside the scope of theembodiments. Further, it will be understood that the embodiments are notlimited to the particular details described in the Examples andComparative Examples.

EXAMPLE Example 1

An anode was prepared as an ITO (7 nm)/Ag (100 nm)/ITO (7 nm) substrateusing glass available from Corning, which was cut into a size of 50mm×50 mm×0.7 mm. The substrate was sonicated in isopropyl alcohol andpure water for 30 minutes each, cleaned with ozone for 10 minutes, andthen mounted on a vacuum depositor.

Compound HT3 was vacuum deposited on the substrate at a thickness of1,400 Å to form a hole transport layer. Then, ADN (a host) and FD9 (adopant) were co-deposited at a weight ratio of 200:3 on the holetransport layer to form an emission layer having a thickness of 200 Å.

Subsequently, Compound 1 and Compound A1 were co-deposited at a weightratio of 50:50 on the emission layer to form a charge control layerhaving a thickness of 50 Å. Compound B1 and LiQ were co-deposited at aweight ratio of 50:50 to form an electron transport layer having athickness of 310 Å on the charge control layer. LiQ was vacuum-depositedon the electron transport layer to form an electron injection layerhaving a thickenss of 5 Å, and then, Mg—Ag was vacuum-desposited on theelectron injection layer to form a cathode having a thickness of 110 Å,thereby completing manufacture of an organic light-emitting device.

Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound A12 was used instead of Compound A1in the formation of the charge control layer.

Example 3

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 10 was used instead of Compound 1 inthe formation of the charge control layer.

Example 4

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 10 was used instead of Compound 1,and Compound A12 was used instead of Compound A1 in the formation of thecharge control layer.

Example 5

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound B7 was used instead of Compound B1 inthe formation of the electron transport layer.

Example 6

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound A12 was used instead of Compound A1in the formation of the charge control layer, and Compound B7 was usedinstead of Compound B1 in the formation of the electron transport layer.

Example 7

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 10 was used instead of Compound 1 inthe formation of the charge control layer, and Compound B7 was usedinstead of Compound B1 in the formation of the electron transport layer.

Example 8

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 10 was used instead of Compound 1,and Compound A12 was used instead of Compound A1 in the formation of thecharge control layer, and Compound B7 was used instead of Compound B1 inthe formation of the electron transport layer.

Comparative Example 1

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound A1 was not used in the formation ofthe charge control layer.

Comparative Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 10 was used instead of Compound 1,and Compound A1 was not used in the formation of the charge controllayer.

Comparative Example 3

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 1 was not used in the formation ofthe charge control layer.

Comparative Example 4

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Compound 1 was not used, and Compound A12 wasused instead of Compound A1 in the formation of the charge controllayer.

Comparative Example 5

An organic light-emitting device was manufactured in the same manner asin Example 1, except that Alq₃ was used instead of Compound B1 and LiQin the formation of the electron transport layer.

Comparative Example 6

An organic light-emitting device was manufactured in the same manner asin Example 1, except that the charge control layer was not formed.

Evaluation Example 1

Current densities, efficiencies, and half-lives of the organiclight-emitting devices prepared in Examples 1 to 8 and ComparativeExamples 1 to 6 were measured by using a Kethley SMU 236 and a luminancemeter PR650, and the results are shown in Table 1, below. The half-liveswere defined as the time for the luminance of an organic light-emittingdevice to decline to 95% of its initial luminance after driving theorganic light-emitting device.

TABLE 1 Electron Current Lifespan transport density Efficiency (T95%)Charge control layer layer (mA/cm²) (cd/A) (h) Example 1 Compound 1 Compound A1  Compound 10 6.1 222 B1 + LiQ Example 2 Compound 1  CompoundA12 Compound 10 5.6 264 B1 + LiQ Example 3 Compound 10 Compound A1 Compound 10 5.3 321 B1+ LiQ Example 4 Compound 10 Compound A12 Compound10 5.5 300 B1 + LiQ Example 5 Compound 1  Compound A1  Compound 10 5.8201 B7 + LiQ Example 6 Compound 1  Compound A12 Compound 10 5.1 253 B7 +LiQ Example 7 Compound 10 Compound A1  Compound 10 5.2 279 B7 + LiQExample 8 Compound 10 Compound A12 Compound 10 5.0 337 B7 + LiQComparative Compound 1  — Compound 10 4.1 210 Example 1 B1 + LiQComparative Compound 10 — Compound 10 4.3 183 Example 2 B1 + LiQComparative — Compound A1  Compound 10 5.4 105 Example 3 B1 + LiQComparative — Compound A12 Compound 10 5.2 70 Example 4 B1 + LiQComparative Compound 1  Compound A1  Alq₃ 10 3.2 245 Example 5Comparative — — Compound 10 4.7 167 Example 6 B1+ LiQ

Referring to Table 1, it may be seen that efficiencies and half-lives ofthe organic light-emitting devices prepared in Examples 1 to 8 wereimproved, compared to those of the organic light-emitting devicesprepared in Comoparative Examples 1 to 6.

As described above, according to the one or more of the above exemplaryembodiments, an organic light-emitting device may have high efficiencyand long lifespan.

Example embodiments have been disclosed herein, and although specificterms are employed, they are used and are to be interpreted in a genericand descriptive sense only and not for purpose of limitation. In someinstances, as would be apparent to one of ordinary skill in the art asof the filing of the present application, features, characteristics,and/or elements described in connection with a particular embodiment maybe used singly or in combination with features, characteristics, and/orelements described in connection with other embodiments unless otherwisespecifically indicated. Accordingly, it will be understood by those ofskill in the art that various changes in form and details may be madewithout departing from the spirit and scope of the present invention asset forth in the following claims.

What is claimed is:
 1. An organic light-emitting device, comprising: afirst electrode; a second electrode facing the first electrode; anemission layer between the first electrode and the second electrode; andan electron transport region between the second electrode and theemission layer, wherein the electron transport region includes: at leastone first compound represented by the following Formula 1, at least onesecond compound represented by the following Formula 2, and at least onethird compound represented by the following Formula 30:

wherein, in Formula 30, R₃₄ to R₄₃ are each independently selected froma group represented by the following Formula 50, a group represented bythe following Formula 51, a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅); wherein atleast one of R₃₄ to R₃₈ is a group represented by Formula 50, and atleast one of R₃₉ to R₄₃ is a group represented by Formula 51;

wherein, in Formulae 1, 2, 30, 50, and 51, X₃₁ is C(R₃₁) or N, X₃₂ isC(R₃₂) or N, X₃₃ is C(R₃₃) or N, and at least one of X₃₁ to X₃₃ is N;X₅₅ is C(R₅₅) or N, X₅₆ is C(R₅₆) or N, X₅₇ is C(R₅₇) or N, X₅₈ isC(R₅₈) or N, at least one of X₅₅ and X₅₆ in Formula 50 is N, and atleast one of X₅₇ and X₅₈ in Formula 51 is N; L₁₁ to L₁₃, L₂₁ to L₂₃, andL₃₁ to L₃₃ are each independently selected from a substituted orunsubstituted C₃-C₁₀ cycloalkylene group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₁-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted divalentnon-aromatic condensed heteropolycyclic group; a11 to a13, a21 to a23,and a31 to a33 are each independently an integer selected from 0 to 3;Ar₁₁ is a substituted or unsubstituted C₁-C₆₀ heteroaryl group includingone nitrogen atom; Ar₂₁ is a substituted or unsubstituted C₁-C₆₀heteroaryl group including at least two nitrogen atoms; Ar₁₂, Ar₂₂, andAr₃₁ are each independently selected from a substituted or unsubstitutedC₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group; R₁₁ to R₁₄, R₂₁ to R₂₄,R₃₁ to R₃₃, and R₅₁ to R₅₈ are each independently selected from ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, asubstituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), and —B(Q₄)(Q₅); b11, b13, b21,b23, c2, and c4 are each independently an integer selected from 0 to 4,b12, b14, b22, b24, c1, and c3 are each independently an integerselected from 0 to 3; * is a binding site to a neighboring atom; atleast one substituent of the substituted C₃-C₁₀ cycloalkylene group,substituted C₁-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₁-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₁-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed heteropolycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₁-C₆₀ alkoxy group,substituted C₃-C₁₀ cycloalkyl group, substituted C₁-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substitutedC₁-C₆₀ heteroaryl group, substituted monovalent non-aromatic condensedpolycyclic group, and substituted monovalent non-aromatic condensedheteropolycyclic group is selected from: a deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), and —B(Q₁₄)(Q₁₅);a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group; a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, and a monovalentnon-aromatic condensed heteropolycyclic group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), and —B(Q₂₄)(Q₂₅);and —Si(Q₃₁)(Q₃₂)(Q₃₃) and —B(Q₃₄)(Q₃₅), and wherein Q₁ to Q₅, Q₁₁ toQ₁₅, Q₂₁ to Q₂₅, and Q₃₁ to Q₃₅ are each independently selected from ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.
 2. The organiclight-emitting device as claimed in claim 1, wherein L₁₁ to L₁₃ are eachindependently selected from: a phenylene group, a naphthylene group, atriphenylenylene group, and a pyridinylene group; and a phenylene group,a naphthylene group, a triphenylenylene group, and a pyridinylene group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, a methyl group,an ethyl group, an n-propyl group, an iso-propyl group, an n-butylgroup, an iso-butyl group, a sec-butyl group, a tert-butyl group, aphenyl group, a naphthyl group, a triphenylene group, and a pyridinylgroup.
 3. The organic light-emitting device as claimed in claim 1,wherein Ar₁₁ is selected from: a pyridinyl group, a pyrrolyl group, anindolyl group, an isoindolyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phenanthridinyl group, an acridinylgroup, and a phenanthrolinyl group; and a pyridinyl group, a pyrrolylgroup, an indolyl group, an isoindolyl group, a quinolinyl group, anisoquinolinyl group, a benzoquinolinyl group, a phenanthridinyl group,an acridinyl group, and a phenanthrolinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, a methyl group, an ethyl group, ann-propyl group, an iso-propyl group, an n-butyl group, an iso-butylgroup, a sec-butyl group, a tert-butyl group, a phenyl group, a naphthylgroup, a pyridinyl group, a pyrrolyl group, an indolyl group, anisoindolyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phenanthridinyl group, an acridinyl group, anda phenanthrolinyl group.
 4. The organic light-emitting device as claimedin claim 1, wherein Ar₁₁ is a group represented by one of the followingFormulae 4-1 to 4-23:

wherein, in Formulae 4-1 to 4-23, Z₄₁ and Z₄₂ are each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, and a carbazolyl group, f1 is an integer selectedfrom 0 to 4, f2 is an integer selected from 0 to 6, f3 is an integerselected from 0 to 5, f4 is an integer selected from 0 to 8, and * is abinding site to a neighboring atom.
 5. The organic light-emitting deviceas claimed in claim 1, wherein Ar₁₁ is selected from: a pyridinyl group;and a pyridinyl group substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, and a pyridinylgroup.
 6. The organic light-emitting device as claimed in claim 1,wherein Ar₁₂ is selected from: a phenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a triphenylene group, and a pyridinylgroup; and a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a triphenylene group, and a pyridinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, and apyridinyl group.
 7. The organic light-emitting device as claimed inclaim 1, wherein the first compound represented by Formula 1 isrepresented by one of the following Formulae 1A to 1P:

wherein, in Formulae 1A to 1P, L₁₁ to L₁₃, Ar₁₂, R₁₁ to R₁₄, a11 to a13,and b11 to b14 are defined the same as L₁₁ to L₁₃, Ar₁₂, R₁₁ to R₁₄, a11to a13, and b11 to b14 of Formula 1, and Ar₁₁ is selected from: apyridinyl group; a pyridinyl group substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, a methyl group, an ethyl group, an n-propyl group,an iso-propyl group, an n-butyl group, an iso-butyl group, a sec-butylgroup, a tert-butyl group, a phenyl group, a naphthyl group, and apyridinyl group.
 8. The organic light-emitting device as claimed inclaim 1, wherein L₂₁ to L₂₃ are each independently selected from: aphenylene group, a naphthylene group, a triphenylenylene group, apyridinylene group, an imidazolylene group, a pyrazolylene group, apyriazinylene group, a cinnolinylene group, a pyrazinylene group, aphthalazinylene group, a quinazolinylene group, a quinoxalinylene group,a pyrimidinylene group, a quinolinylene group, and a triazinylene group;and a phenylene group, a naphthylene group, a triphenylenylene group, apyridinylene group, an imidazolylene group, a pyrazolylene group, apyriazinylene group, a cinnolinylene group, a pyrazinylene group, aphthalazinylene group, a quinazolinylene group, a quinoxalinylene group,a pyrimidinylene group, a quinolinylene group, and a triazinylene group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, a methyl group,an ethyl group, an n-propyl group, an iso-propyl group, an n-butylgroup, an iso-butyl group, a sec-butyl group, a tert-butyl group, aphenyl group, a naphthyl group, a triphenylene group, a pyridinyl group,an imidazolyl group, a pyrazolyl group, a pyriazinyl group, a cinnolinylgroup, a pyrazinyl group, a phthalazinyl group, a quinazolinyl group, aquinoxalinyl group, a pyrimidinyl group, a quinolinyl group, and atriazinyl group.
 9. The organic light-emitting device as claimed inclaim 1, wherein Ar₂₁ is selected from: a pyrazinyl group, a pyrimidinylgroup, a pyrazolyl group, an imidazolyl group, a pyriazinyl group, acinnolinyl group, a phthalazinyl group, a quinazolinyl group, aquinoxalinyl group, and a triazinyl group; and a pyrazinyl group, apyrimidinyl group, a pyrazolyl group, an imidazolyl group, a pyriazinylgroup, a cinnolinyl group, a phthalazinyl group, a quinazolinyl group, aquinoxalinyl group, and a triazinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, a pyrazinylgroup, a pyrimidinyl group, a pyrazolyl group, an imidazolyl group, apyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group.
 10. Theorganic light-emitting device as claimed in claim 1, wherein Ar₂₁ is agroup represented by one of the following Formulae 5-1 to 5-10:

wherein, in Formulae 5-1 to 5-10, Z₅₁ and Z₅₂ are each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, and a triazinyl group, g1 is an integerselected from 0 to 3, g2 is an integer selected from 0 to 2, g3 is 0 or1, g4 is an integer selected from 0 to 4, g5 is an integer selected from0 to 2, and * is a binding site to a neighboring atom.
 11. The organiclight-emitting device as claimed in claim 1, wherein Ar₂₁ is selectedfrom: a pyrimidinyl group and a triazinyl group; and a pyrimidinyl groupand a triazinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, a pyrimidinyl group,and a triazinyl group.
 12. The organic light-emitting device as claimedin claim 1, wherein Ar₂₂ is selected from: a phenyl group, a naphthylgroup, a triphenylene group, a pyrazinyl group, a pyrimidinyl group, apyrazolyl group, an imidazolyl group, a pyriazinyl group, a cinnolinylgroup, a phthalazinyl group, a quinazolinyl group, a quinoxalinyl group,and a triazinyl group; and a phenyl group, a naphthyl group, atriphenylene group, a pyrazinyl group, a pyrimidinyl group, a pyrazolylgroup, an imidazolyl group, a pyriazinyl group, a cinnolinyl group, aphthalazinyl group, a quinazolinyl group, a quinoxalinyl group, and atriazinyl group, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aphenyl group, a naphthyl group, a triphenylene group, a pyrazinyl group,a pyrimidinyl group, a pyrazolyl group, an imidazolyl group, apyriazinyl group, a cinnolinyl group, a phthalazinyl group, aquinazolinyl group, a quinoxalinyl group, and a triazinyl group.
 13. Theorganic light-emitting device as claimed in claim 1, wherein the secondcompound represented by Formula 2 is represented by one of the followingFormulae 2A to 2P:

wherein, in Formulae 2A to 2P, L₂₁ to L₂₃, Ar₂₂, R₂₁ to R₂₄, a21 to a23,and b21 to b24 are defined the same as L₂₁ to L₂₃, Ar₂₂, R₂₁ to R₂₄, a21to a23, and b21 to b24 of Formula 2, and Ar₂₁ is selected from: apyrimidinyl group and a triazinyl group; and a pyrimidinyl group and atriazinyl group, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, a naphthyl group, a pyrimidinyl group,and a triazinyl group.
 14. The organic light-emitting device as claimedin claim 1, wherein Ar₃₁ is selected from: a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, and a triphenylene group; anda phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one selected from a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, and—Si(Q₃₁)(Q₃₂)(Q₃₃), wherein Q₃₁ to Q₃₃ are each independently selectedfrom a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, and a chrysenyl group.
 15. The organiclight-emitting device as claimed in claim 1, wherein R₃₄, R₃₆, R₃₈, R₃₉,R₄₁, and R₄₃ are each independently selected from a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, anda C₁-C₂₀ alkoxy group; in Formula 30, R₃₅ is a group represented byFormula 50, and R₄₂ is a group represented by Formula 51; R₃₇ and R₄₀are each independently selected from: a phenyl group, a naphthyl group,a fluorenyl group, a pyridinyl group, a quinolinyl group, and anisoquinolinyl group; and a phenyl group, a naphthyl group, a fluorenylgroup, a pyridinyl group, a quinolinyl group, and an isoquinolinylgroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, aphenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group, aquinolinyl group, and an isoquinolinyl group; the group represented byFormula 50 and the group represented by Formula 51 are eachindependently a group represented by one of the following Formulae 8-1to 8-30:

wherein, in Formulae 8-1 to 8-30, * is a binding site to a neighboringatom.
 16. The organic light-emitting device as claimed in claim 1,wherein R₁₁ to R₁₄, R₂₁ to R₂₄, R₃₁ to R₃₃, and R₅₁ to R₅₈ are eachindependently selected from: a hydrogen, —F, a cyano group, a nitrogroup, a methyl group, an ethyl group, a propyl group, an n-butyl group,an iso-butyl group, a sec-butyl group, a tert-butyl group, an n-pentylgroup, an isopentyl group, a sec-pentyl group, a tert-pentyl group, ann-hexyl group, an iso-hexyl group, a sec-hexyl group, a tert-hexylgroup, an n-heptyl group, an iso-heptyl group, a sec-heptyl group, atert-heptyl group, an n-octyl group, an iso-octyl group, a sec-octylgroup, a tert-octyl group, an n-nonyl group, an iso-nonyl group, asec-nonyl group, a tert-nonyl group, an n-decanyl group, an iso-decanylgroup, a sec-decanyl group, a tert-decanyl group, a methoxy group, anethoxy group, a propoxy group, a butoxy group, a pentoxy group, a phenylgroup, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and atriazinyl group; a methyl group, an ethyl group, a propyl group, ann-butyl group, an iso-butyl group, a sec-butyl group, a tert-butylgroup, an n-pentyl group, an iso-pentyl group, a sec-pentyl group, atert-pentyl group, an n-hexyl group, an iso-hexyl group, a sec-hexylgroup, a tert-hexyl group, an n-heptyl group, an iso-heptyl group, asec-heptyl group, a tert-heptyl group, an n-octyl group, an iso-octylgroup, a sec-octyl group, a tert-octyl group, an n-nonyl group, aniso-nonyl group, a sec-nonyl group, a tert-nonyl group, an n-decanylgroup, an iso-decanyl group, a sec-decanyl group, a tert-decanyl group,a methoxy group, an ethoxy group, a propoxy group, a butoxy group, apentoxy group, a phenyl group, a naphthyl group, a pyridinyl group, apyrimidinyl group, and a triazinyl group, each substituted with at leastone selected from —F, a cyano group, a nitro group, a phenyl group, anaphthyl group, a pyridinyl group, a pyrimidinyl group, a triazinylgroup, and —Si(Q₃₃)(Q₃₄)(Q₃₅); and —Si(Q₁)(Q₂)(Q₃), wherein Q₁ to Q₃ andQ₃₁ to Q₃₃ are each independently selected from a hydrogen, a C₁-C₂₀alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, a triazinyl group, a quinolinylgroup, and an isoquinolinyl group.
 17. The organic light-emitting deviceas claimed in claim 1, wherein the third compound represented by Formula30 is represented by the following Formula 30A:

wherein, in Formula 30A, X₃₁ to X₃₃, X₅₅ to X₅₈, L₃₁ to L₃₃, Ar₃₁, R₃₁to R₃₄, R₃₆ to R₄₁, R₄₃, R₅₁ to R₅₄, a31 to a33, and c1 to c4 aredefined the same as X₃₁ to X₃₃, X₅₅ to X₅₈, L₃₁ to L₃₃, Ar₃₁, R₃₁ toR₃₄, R₃₆ to R₄₁, R₄₃, R₅₁ to R₅₄, a31 to a33, and c1 to c4 of Formula30.
 18. The organic light-emitting device as claimed in claim 1, whereinthe third compound represented by Formula 30 is represented by one ofthe following Formulae 31-1 to 31-9:

wherein, in Formulae 31-1 to 31-9, Ar₃₁ is selected from: a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, and atriphenylene group; and a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, and a chrysenyl group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),wherein Q₃₁ to Q₃₃ are each independently selected from a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, and a chrysenyl group; R₃₇ and R₄₀ are each independentlyselected from: a phenyl group, a naphthyl group, a fluorenyl group, apyridinyl group, a quinolinyl group, and an isoquinolinyl group; and aphenyl group, a naphthyl group, a fluorenyl group, a pyridinyl group, aquinolinyl group, and an isoquinolinyl group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, afluorenyl group, a pyridinyl group, a quinolinyl group, and anisoquinolinyl group.
 19. The organic light-emitting device as claimed inclaim 1, wherein: the first compound represented by Formula 1 is one ofthe following Compounds 1 to 21, the second compound represented byFormula 2 is one of the following Compounds A1 to A11, and the thirdcompound represented by Formula 30 is one of the following Compounds B1to B12:


20. The organic light-emitting device as claimed in claim 1, wherein:the electron transport region includes: an electron transport layer; anda charge control layer between the electron transport layer and theemission layer, the charge control layer includes the first compound andthe second compound, and the electron transport layer includes the thirdcompound.